EP0903528A1 - Elément de tuyau avec soufflet métallique - Google Patents

Elément de tuyau avec soufflet métallique Download PDF

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Publication number
EP0903528A1
EP0903528A1 EP98104867A EP98104867A EP0903528A1 EP 0903528 A1 EP0903528 A1 EP 0903528A1 EP 98104867 A EP98104867 A EP 98104867A EP 98104867 A EP98104867 A EP 98104867A EP 0903528 A1 EP0903528 A1 EP 0903528A1
Authority
EP
European Patent Office
Prior art keywords
hose
element according
pipe element
bellows
line part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98104867A
Other languages
German (de)
English (en)
Other versions
EP0903528B1 (fr
Inventor
Fabian ELSÄSSER
Tom Krawietz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Witzenmann GmbH
Original Assignee
Witzenmann GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Witzenmann GmbH filed Critical Witzenmann GmbH
Priority to EP02011706A priority Critical patent/EP1241389B1/fr
Priority to JP10265857A priority patent/JPH11153267A/ja
Priority to US09/157,950 priority patent/US6062268A/en
Publication of EP0903528A1 publication Critical patent/EP0903528A1/fr
Application granted granted Critical
Publication of EP0903528B1 publication Critical patent/EP0903528B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1811—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
    • F01N13/1816—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration the pipe sections being joined together by flexible tubular elements only, e.g. using bellows or strip-wound pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00—Adjustable joints, Joints allowing movement
    • F16L27/10—Adjustable joints, Joints allowing movement comprising a flexible connection only, e.g. for damping vibrations
    • F16L27/107—Adjustable joints, Joints allowing movement comprising a flexible connection only, e.g. for damping vibrations the ends of the pipe being interconnected by a flexible sleeve
    • F16L27/11—Adjustable joints, Joints allowing movement comprising a flexible connection only, e.g. for damping vibrations the ends of the pipe being interconnected by a flexible sleeve the sleeve having the form of a bellows with multiple corrugations
    • F16L27/111—Adjustable joints, Joints allowing movement comprising a flexible connection only, e.g. for damping vibrations the ends of the pipe being interconnected by a flexible sleeve the sleeve having the form of a bellows with multiple corrugations the bellows being reinforced

Definitions

  • the invention relates to a line element, in particular for exhaust and exhaust gas recirculation lines of internal combustion engines in motor vehicles, with one with cylindrical Conduit part made of metal provided at the ends, the at least one with cylindrical connection ends provided, helical or corrugated contains flexible bellows, and one coaxial to the bellows braided tube arranged on the outside thereof Made of metal wire, with the line part and hose firmly are at least indirectly connected to each other and the Inner diameter of the hose essentially that corresponds to the free outside diameter of the line part.
  • the bellows are either absolutely tight from a tube or practically leak-tight due to helical winding of a pre-profiled metal strip.
  • the line elements serve the absolute or practical fluid-tight, in particular gas-tight flexible connection two lines connecting on both sides, in the preferred Case of flexible connection within the Exhaust pipe of a motor vehicle, where the pipe elements have the task of movements in particular the Allow engine and engine vibrations from the passenger compartment disconnect.
  • the pipe section does not only have circular designs in question, but in particular also oval designs, if this is desirable for reasons of space, for example is.
  • the object of the invention is therefore a line element of the type mentioned in such a way that without obstructing the mobility of the line part and basically without additional components and one associated weight increase the vibration behavior the bellows and thus the line part in the sense of reducing the acoustic side effects and an increase in lifespan becomes.
  • This object is achieved in that the outer braid tube due to it as a result a radial cross-section reduction, at least locally in grinding plant against which the free outer diameter of the line part forming walls of the line part is brought.
  • the Line part at all or exclusively by a corrugated metal pipe with the mentioned connection ends be educated.
  • the measure according to the invention can now be used here the outer tube the task of damping the Bellows or several cascaded and if necessary connected to each other via intermediate pipes Bellows take over, so that the line part in it initiated vibrations no longer passes on as well in terms of its resonance vibration behavior is disgruntled that such resonance vibrations in the first place cannot arise.
  • the hose is now for that effective against the bellows rim and / or the intermediate pipe planted.
  • the dampening effect of the outer braid hose can through the choice of the size of the preload as well as through the expansion and arrangement of the areas of rubbing System between the hose and the line part of the respective Requirements are easily adjusted so that on on the one hand achieves sufficient damping but on the other side between the line section and hose not an unnecessarily high friction bond and thus Wear occurs.
  • the pre-tension of the outer braid hose against the line part also leads to the fact that due to permanent and resilient system in case of load changes or vibration amplifiers a braiding is prevented, usually not only with high noise levels, but also with one correspondingly large strain on the braid is.
  • the soft design of the braided tube creates due to the special hose characteristics used such as degree of coverage, number of wires and Wire cross-section a clear weight and thus also cost reduction as these sizes vary accordingly the lower requirements for the load capacity have the hose reduced.
  • the one here achieved relatively loose integration of the hose leads also that he not only in the printing direction, but is now also axially flexible in the direction of pull and thus the line part in its total mobility not restricted.
  • the invention basically comes with the usual components, so far in particular, no increase in weight of the line element results.
  • the line part axially one behind the other have at least two bellows, with adjacent ones Bellows, if necessary, in one piece through an intermediate tube made of metal are interconnected, the inside diameter in essentially the free inner diameter of the adjacent Bellows corresponds.
  • the outer braid hose at his Installation in the pipe element by axial upsetting partially to a compared to the free outer diameter remaining larger outside diameter of the line part deformed and then essentially after this diameter enlargement in the plastic range is installed.
  • This measure has one resulting from the parameters of the hose Minimum length of the hose the effect that the outer braid hose between the larger areas Outside diameter contracts, depending on Hose length one or more ring-shaped places a rubbing system between the braided hose and Line part are formed.
  • the braid angle i.e. the Angle that the braid wires are facing the tube center axis take, preferably between about 50 ° and 70 °.
  • the hose should be a Have a number of bobbins of between 36 and 48, the number of wires per clapper in particular should be between about 4 and 9.
  • a degree of coverage of the braided tube of approximately between 35% and 75%, based on the total hose surface.
  • Braided sleeving now has greater manufacturing tolerances can have as far as its axial length is concerned; because by upsetting the desired final length be adjusted so that any existing ones before upsetting Length deviations do not come into play.
  • the pipe element of the present invention comes moreover without the additional components usually used such as B. slotted end sleeves or Knitted layers that were previously used to to suppress the above-mentioned braiding or to dampen.
  • the Outer braid hose with targeted cross-section reductions be provided, especially if instead of just reducing one cross section, several to be provided by which the damping of the Line part is still increased.
  • the Outer braid hose structured or be profiled and for this purpose, for example with in particular evenly over the hose length distributed local dents. This can be done beforehand on the outer braid hose by appropriate Embossing processes are applied and given the possibility of locating the grinding plant between pipe element and hose according to location and Predetermine size exactly.
  • the outer braid hose with at least one is parallel to its longitudinal axis extending profile shaft is provided, however expediently several such profile waves evenly distributed over the circumference of the outer braid hose are arranged.
  • profile waves can be started a braided hose using suitable forming tools by means of at least local plastic Apply deformation. They have the effect that now there is a beating of the braid prevented the line section over its entire length is also when the line element during the Operating is compressed or axially compressed.
  • the material of the braided tube so can be made of steel or stainless steel wire, Spring wire, ceramic fibers or high temperature resistant Be made of plastic.
  • the material of the braided tube so can be made of steel or stainless steel wire, Spring wire, ceramic fibers or high temperature resistant Be made of plastic.
  • different materials in a clapper or to provide a braided hose It means that optimal setting within the scope of the present invention of the braid properties is possible, for what different materials and on the other hand, a different outer braid geometry, that is, various cross-sectional reductions have it used in different places.
  • connection ends and in particular the outside of the outer braid tube there concerns, it is advantageous that the respective connection between outer braid hose and cylindrical Ends of the line part with the addition of a from the outside without play and in the fixed connection formed with included support ring made of metal is.
  • the corrugated Part of a subsequent bellows facing End of the respective support ring is essentially conical is widened to a friction edge between the support ring and to avoid braided tubing.
  • At least the first, but especially the first two next to the cylindrical connection ends of a bellows outer brim of the bellows has a reduced outer diameter have the essentially each corrugated between the outside diameter of the rest Part of the bellows and that of the adjacent cylindrical Connection end lies. This is not only ensured that the diameter of the outer braid hose not abruptly from a diameter passes the other diameter; but above all becomes the outer braided hose in the area of the connection ends the curved outer shape is already specified, the up to the or the cross-sectional reductions is continued.
  • the outer braid hose can be used for the outer braid hose be that this is made of corrosion and temperature resistant Material exists or with this in particular is coated on the inside, the Coating material suitably has conductivity, to the frictional wear between the line part and to keep the hose as low as possible.
  • the same Purpose can also serve that the outer braid hose made with the addition of glass fibers and / or with a glass fiber braid or - knitted is covered.
  • the end of the External braided hose connected cylindrical connection end of the line part a larger inner diameter has as the essential part of remaining length of the line section.
  • this end can be plugged in with the subsequent one Connect the line so that the internal cross section the subsequent management essentially the for the gas flow remaining internal cross section of the Line element corresponds.
  • the line element according to the invention can also in be further developed in a manner known per se, that the line part one on the inside of the Line element arranged braided hose Has metal, and that one end of the inner braided hose with a cylindrical end of the line part is firmly connected.
  • This inner braided hose serves the exhaust gas flow to run within the bellows in this way Vortex formation on the inner brim of the bellows shaft and thus the creation of flow noises or To prevent secondary noise. At the same time this way the inner brims of the bellows shafts thermally less stressed, resulting in an increase in lifespan of the bellows.
  • this design of the line element is selected, then it is while using a cylindrical Connection end of the line section with enlarged Inner diameter advantageous that the first next to the cylindrical brim of the inner brim of the Bellows has an inner diameter that is substantially between the inner diameter of the cylindrical Connection end and the free inner diameter of the bellows lies. In this way it starts from the end of the connection the inner braided tube with an arcuate Transition to the free inner diameter of the bellows performed so that it is not too close to the connection end a special stress due to a jump in diameter can come.
  • a flexible one can be used instead of the inner braid Agraffschlauch be provided from a through helical winding of profiled Band layers made of metal hose and especially for thermal shielding of the bellows serves against the hot exhaust gas flow.
  • the line element according to Figure 1 consists essentially from a line part in the form of a ring-corrugated Bellows 1, the bellows waves outer brim 2 and inner brim 3 form.
  • the bellows 1 has cylindrical connection ends 4, 5, with the end on the connection ends an outer braided hose serving as a sheathing 6 made of metal sits together with one arranged inside the bellows flexible Agraff hose 7 made of metal, which is pre-profiled by winding Band layers is made.
  • the bellows 1 with the outer braided hose 6 is on the outside at both ends with the help of outer support rings 9, 10 the cylindrical connection ends 4, 5 of the bellows 1 connected.
  • the terminal connection of parts 4, 6, 7 and 9 on the one hand and parts 5, 6, 7 and 10 on the other hand can in the usual way by spot welding or by mutual radial pressing of the parts mentioned made from the inside out and / or from the outside in be.
  • the outer support rings 9 and 10 are with respect to them the middle of the bellows 1 facing side with a Widening or flanging 14, 15 provided here an edge pressure against the outer braided tube 6 to avoid.
  • the outer diameter is the same of the metal bellows 1 and the inner diameter of the outer braided hose 6 only in one area exactly, namely in the axially central region 13, in the the braid tube with a local, ring-shaped Cross-section reduction is provided and thereby rests under tension on the bellows.
  • the outer braid hose is located in the area of local cross-sectional reduction 13 in frictional contact with the metal bellows, whereby on the one hand the natural frequency of the metal bellows out of tune and in particular its vibration by the System dampens. This leads to in an advantageous manner a strong noise reduction.
  • FIG. 2 differs from the embodiment of Figure 1 in that there line element with two annular local Cross-sectional reductions 16, 17 is provided and thus has three domed sections, namely between the half-high outer brim 11 and the first cross-sectional reduction 16, between the first cross-sectional reduction 16 and the second cross-sectional reduction 17 and between the second cross-sectional reduction 17 and the other half-high brim 12th
  • the present invention provides the Advantage that due to the friction of the outer braid hose on the one hand a considerable part of the line Noise reduction in particular through detuning the bellows natural frequency and the other due to the constant elastic system the effect of Braids severely reduced or prevented becomes. Finally, at least in the executions 1 and 2 of the outer braid hose the line element no longer in the axial direction of pull and with corresponding changes in length.
EP98104867A 1997-09-23 1998-03-18 Elément de tuyau avec soufflet métallique Expired - Lifetime EP0903528B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP02011706A EP1241389B1 (fr) 1997-09-23 1998-03-18 Elément de tuyau avec soufflet métallique
JP10265857A JPH11153267A (ja) 1997-09-23 1998-09-21 チューブ・エレメント
US09/157,950 US6062268A (en) 1997-09-23 1998-09-22 Tube element with one metal bellows

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19742875 1997-09-23
DE19742875A DE19742875A1 (de) 1997-09-23 1997-09-23 Leitungselement mit einem Balg aus Metall

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP02011706A Division EP1241389B1 (fr) 1997-09-23 1998-03-18 Elément de tuyau avec soufflet métallique

Publications (2)

Publication Number Publication Date
EP0903528A1 true EP0903528A1 (fr) 1999-03-24
EP0903528B1 EP0903528B1 (fr) 2003-02-19

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EP98104867A Expired - Lifetime EP0903528B1 (fr) 1997-09-23 1998-03-18 Elément de tuyau avec soufflet métallique
EP02011706A Expired - Lifetime EP1241389B1 (fr) 1997-09-23 1998-03-18 Elément de tuyau avec soufflet métallique

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP02011706A Expired - Lifetime EP1241389B1 (fr) 1997-09-23 1998-03-18 Elément de tuyau avec soufflet métallique

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EP (2) EP0903528B1 (fr)
DE (3) DE19742875A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1010872A2 (fr) * 1998-12-18 2000-06-21 Volkswagen Aktiengesellschaft Conduite flexible
WO2002029302A1 (fr) 2000-10-04 2002-04-11 Iwka Balg- Und Kompensatoren-Technologie Gmbh Element de conduite flexible
DE102012210387A1 (de) 2012-06-20 2013-12-24 Witzenmann Gmbh Flexibles Leitungsteil und Verfahren zu dessen Herstellung
CN114729716A (zh) * 2019-11-14 2022-07-08 纽珀有限公司 软管装置和用于构成软管连接的方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10007549A1 (de) * 2000-02-18 2001-09-06 Friedmund Nagel Schalldämpfende Leitung
DE202007013515U1 (de) * 2007-09-27 2009-02-19 Witzenmann Gmbh Dämpfungsanordnung
DE102008017598B4 (de) * 2008-04-07 2014-12-04 Witzenmann Gmbh Flexibles Leitungselement und Verfahren zum Befestigen eines Außengestrickes

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0770808A1 (fr) * 1995-10-23 1997-05-02 Calsonic Corporation Raccordement de tuyaux flexible pour dispositif d'échappement automobile

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4438213A1 (de) * 1994-10-26 1996-05-02 Witzenmann Metallschlauchfab Leitungselement, insbesondere für die Abgasleitung von Verbrennungskraftmaschinen
DE19641963C1 (de) * 1996-03-20 1997-10-09 Witzenmann Metallschlauchfab Leitungselement mit einem Balg aus Metall

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0770808A1 (fr) * 1995-10-23 1997-05-02 Calsonic Corporation Raccordement de tuyaux flexible pour dispositif d'échappement automobile

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1010872A2 (fr) * 1998-12-18 2000-06-21 Volkswagen Aktiengesellschaft Conduite flexible
EP1010872A3 (fr) * 1998-12-18 2000-07-26 Volkswagen Aktiengesellschaft Conduite flexible
WO2002029302A1 (fr) 2000-10-04 2002-04-11 Iwka Balg- Und Kompensatoren-Technologie Gmbh Element de conduite flexible
DE102012210387A1 (de) 2012-06-20 2013-12-24 Witzenmann Gmbh Flexibles Leitungsteil und Verfahren zu dessen Herstellung
CN114729716A (zh) * 2019-11-14 2022-07-08 纽珀有限公司 软管装置和用于构成软管连接的方法

Also Published As

Publication number Publication date
DE59810689D1 (de) 2004-03-04
DE59807231D1 (de) 2003-03-27
EP1241389A1 (fr) 2002-09-18
DE19742875A1 (de) 1999-03-25
EP1241389B1 (fr) 2004-01-28
EP0903528B1 (fr) 2003-02-19

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